Improvement in spring bed-bottoms



o. BREWSTER. SPB IING BED-BOTTOM.

No. 193,218. Patented J'u1y17,1877.

Mine 5%? UNITE ORVILLE BREWSTER, OF WARREN, PENNSYLVANIA.

IMPROVEMENT IN SPRING BED-BOTTOMS.

Specification forming part of Letters Patent No. 193,2R, dated July 17,1877 application filed January 17, 1877. I

bottom, as will be hereinafter more fully setforth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in whichFigure 1 is a plan view of my improved spring bed-bottom. Fig. 2 is alongitudinal section of the same, and Figs. 3 and 4 are detailed viewsof parts thereof.

A A represent the two side rails of my spring bed-bottom. On top andbottom of these side rails, near each end, are placed cross-bars B B,which are connected by means of bolts a a, passing vertically throughthem immediately inside of the side rails.

The top cross-bars B B, at the ends of the side rails, are connected byspiral springs O G, and these springs are connected, at suitableintervals, by links b 1), arranged alternately, as shown, so that whenthe springs are stretched the entire bed-bottom will form a series ofdiamond-shaped figures.

The springs O are connected with the top crossbar B by means of L-shapedhooks D, inverted, as shown. The upper horizontal arm of the hook isprovided on its under side with a spur, d, and said arm is passed orscrewed into the end of the spring, and the spur d enters the top of thecross-bar. On the lower end of the vertical arm of the hook is anotherspur, e, which enters the outer side of the said top cross-bar, whensaid crossbars are pushed outward by means hereinafter described.

On top of each side rail A are placed two overlapping levers, G G,which, when pressed down upon the rail, force the cross-bars B outward,stretching the springs 0. These levers are fastened by a single screw,h, to the side rail. The act of forcing outward the cross-bars andstretching the springs forces the spurs of the hooks into thecross-bars, so as to hold them firmly.

By removing the screws h the levers G can be raised and the entirebed-bottom sepa rated for shipment, so that it can be packed in verysmall compass.

The tension of the springs O can be easily regulated by loosening thebed-bottom and turning the hooks D to the right or left, so as to screwthe same farther in or out in the springs, the spurs d forming theteeth, which pass through and hold the springs.

The levers G G on top of each side raii A have their outer ends square,while their inner ends are made beveled, so as to overlap each other,and at the inner end of each such bevel or incline is a square shoulder,as show n. In placing these levers in position their outer ends abutagainst the inner edges of the top cross-bars B, and the inner end ofone lever bears against the square shoulder on the other. By nowpressing the inner ends of the two lovers down onto the side rail thelevers are straightened, the cross-bar B forced outward to the ends ofthe side rails, and thereby stretching the springs O 0. When theoverlapping ends of the levers are together fastened to the side rail bythe screw h, the parts are thereby held in proper place, but can,nevertheless, be quickly and easily separated when required.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The L-shaped hook D, provided with the spurs d and e, for'regulatingthe tension of the springs and entering the top and rear of thecross-bars B, as and for the purposes herein set forth.

2. The combination of the bars B, springs 0, connected at alternateintervals by links b, and hooks D, provided with spurs d and e,constructed and arranged substantially as and for the purposes hereinset forth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two, Witnesses.

ORVILLE BREWSTER.

Witnesses; ,i

WM. H. MACDONALD, D. J. HODG-ES.

